Example
c d PT PTOV
*a *b@*c@@ *d
*a : The sign which shows a diesel locomotive (A diesel initial).
*b : The number of the power wheel
| sign | B | C | D | E | F | H |
| number of power wheel | 2 | 3 | 4 | 5 | 6 | 8 |
*c : A form number by the kind
| num. | kind |
| 10`49 | Less than top speed 85km/h |
| 50`89 | More than top speed 85km/h |
| 90`99 | Trial produts |
| 100` | For JR new products |
*d : Manufacture number
Though it is usually a turn from No.1, for example it is distinguished by the specification in the number such as the 500's,the 1000's. And the 900's are used for the preceding trial production car again.